185/55R16
A 185/55R16 tire is 24.01 inches tall and 7.3 inches wide, with a 4.01-inch sidewall, mounted on a 16-inch wheel.
Common fitments: Fit Sport, Swift
Overall diameter
24.01″
610 mm
Sidewall height
4.01″
101.8 mm
Tread width
185 mm
7.3″
Circumference
75.44″
6.3 ft
Revs per mile
840
522 per km
Wheel diameter
16″
aspect ratio 55%
Cross-section
- Overall diameter
- 24.01″
- Sidewall (each side)
- 4.01″
- Wheel
- 16″
185/55R16 in inches and millimeters
Every dimension of a 185/55R16, converted both ways. Calculated from the size code, accurate to about 1%.
| Measurement | Inches | Millimeters |
|---|---|---|
| Overall diameter (height) | 24.01″ | 610 mm |
| Tread width | 7.3″ | 185 mm |
| Sidewall height | 4.01″ | 101.8 mm |
| Wheel diameter | 16″ | 406 mm |
| Circumference | 75.44″ | 1916 mm |
Nominal dimensions from the size code. A real tire varies by a few millimeters between manufacturers, and a loaded tire sits slightly shorter than its free diameter.
185/55R16 compared with other sizes
All 24 practical swaps involving 185/55R16 — diameter change, speedometer impact and a fit verdict for each.
185/55R16 → 175/65R15
175/65R15
Diameter +0.2% · This fits
185/55R16 → 185/60R15
185/60R15
Diameter +1.1% · This fits
185/55R16 → 185/65R15
185/65R15
Diameter −1.9% · This fits
185/55R16 → 195/60R15
195/60R15
Diameter −0.8% · This fits
195/50R16 → 185/55R16
195/50R16
Diameter −1.4% · This fits
195/55R16 → 185/55R16
195/55R16
Diameter +1.8% · This fits
205/55R16 → 185/55R16
205/55R16
Diameter +3.6% · Borderline. Check clearance first
185/60R15 → 185/55R16
185/60R15
Diameter −1.1% · This fits
175/65R15 → 185/55R16
175/65R15
Diameter −0.2% · This fits
215/55R16 → 185/55R16
215/55R16
Diameter +5.4% · Too big a jump
185/65R15 → 185/55R16
185/65R15
Diameter +1.9% · This fits
195/60R15 → 185/55R16
195/60R15
Diameter +0.8% · This fits
215/45R17 → 185/55R16
215/45R17
Diameter +2.5% · This fits
225/45R17 → 185/55R16
225/45R17
Diameter +4.0% · Borderline. Check clearance first
195/65R15 → 185/55R16
195/65R15
Diameter +4.0% · Borderline. Check clearance first
175/65R14 → 185/55R16
175/65R14
Diameter −4.4% · Borderline. Check clearance first
205/50R17 → 185/55R16
205/50R17
Diameter +4.4% · Borderline. Check clearance first
225/40R18 → 185/55R16
225/40R18
Diameter +4.5% · Borderline. Check clearance first
185/55R16 → 195/50R16
195/50R16
Diameter +1.4% · This fits
185/55R16 → 195/55R16
195/55R16
Diameter −1.8% · This fits
185/55R16 → 205/55R16
205/55R16
Diameter −3.5% · Borderline. Check clearance first
185/55R16 → 215/55R16
215/55R16
Diameter −5.1% · Too big a jump
185/55R16 → 215/45R17
215/45R17
Diameter −2.5% · This fits
185/55R16 → 175/65R14
175/65R14
Diameter +4.6% · Borderline. Check clearance first
Common questions
- What is 185/55R16 in inches?
- A 185/55R16 tire is 24.01 inches tall and 7.3 inches wide, with a 4.01-inch sidewall, mounted on a 16-inch wheel. In metric that is 610 mm tall and 185 mm wide. The circumference is 75.44 inches.
- How tall is a 185/55R16 tire?
- 24.01 inches, or 610 mm. That is the overall diameter, wheel included. It turns about 840 times per mile, which is what your speedometer counts.
- What do the numbers in 185/55R16 mean?
- 185 is the tread width in millimeters, 55 is the aspect ratio — the sidewall height as a percentage of the tread width — and 16 is the wheel diameter in inches. So the sidewall is 185 × 55% = 101.8 mm tall.